Device for investigating coal self-combustion tendentiousness based on low temp oxidation oxygen consumption

Abstract

The invention relates to coal self-combustion orientation identifying device based on low temperature oxidizing oxygen-consumption. It is made up thermostatic control box, oxygen density tester, oxygen-consumption testing container, and gas educing pipe. The oxygen-consumption testing container has flat bottom and long bottle neck which is a quartz glass ball cavity set in the thermostatic control box. The long bottle neck is out of the thermostatic control box and sealed by sealing piston. One end of the gas educing pipe is injected into the container through sealed piston. Anther end is connected with oxygen density tester. And it is series connected with air valve switch. The invention makes the identifying method more scientific and reasonable, truly reflects coal low temperature oxidizing characteristic. Thus the identifying result is more reliable and exact.

Description

technical field [0001] The invention belongs to the technical field of identifying and classifying coal spontaneous combustion tendency, and in particular relates to a coal spontaneous combustion tendency identification device based on oxygen consumption. Background technique [0002] Coal spontaneous combustion is one of the major disasters in coal mines and coal storage and transportation. The spontaneous combustion tendency of coal, that is, the difficulty of spontaneous combustion of coal, is the embodiment of low-temperature oxidation of coal, and is one of the inherent properties of coal. Coals from different coal seams and mines have different coal spontaneous combustion tendencies. The tendency of coal spontaneous combustion is the basic basis for the classification of fire prevention and extinguishing grades in coal mines. All fire prevention technologies and measures are based on the identification of coal spontaneous combustion tendency. Therefore, it is very im...

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Problems solved by technology

my country's current coal spontaneous combustion tendency identification device and its corresponding methods have the following shortcomings: 1) The coal spontaneous combustion process not only has physical adsorption of oxygen, but also includes the more important chemical adsorption and chemical reaction process of coal and oxygen; 2) my country's current coal spontaneous combustion tendency is an indirect test method, and there is no evidence that the adsorption capacity of coal at a certain temperature point for oxygen is necessarily related to the spontaneous combustion tendency of coal

The ability of coal to physically absorb oxygen is related to coal surface properties and pore structure, which is a manifestation of coal physical characteristics; 3) The current identification of coal spontaneous combustion tendency in my country has different classification standards for different coal types, that is, the identification results and their classification are different from those of coal. coal type, which contradicts the classification principle of the law

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